Home / 205,117.56-307,637.28-86,871.96

Finding the Fourth Proportional to 205,117.56, 307,637.28 and 86,871.96

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Solution

The fourth proportional to 205,117.56, 307,637.28 and 86,871.96 is: 130,291.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,117.56 : 307,637.28 = 86,871.96 : x
  2. Step 2: Convert to fraction form
    205,117.56/307,637.28 = 86,871.96/x
  3. Step 3: Cross multiply
    205,117.56x = 307,637.28 × 86,871.96
  4. Step 4: Simplify right side
    205,117.56x = 26,725,053,482.67
  5. Step 5: Solve for x
    x = 26,725,053,482.67/205,117.56
  6. Step 6: Final answer
    x = 130,291.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.